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(Ho Model.) 4 2 Sheets-Sheet 1.

T. E WORTHINGTON.

Rotary Drier. No. 230,980. Patented Aug. 10,1880.

OZ @MM'U VZW NPETERS, PLQTO-LITHOGNAPMER, WASHINGTON. D\0.

2 Sheets-Shee't' 2.-

(N0 Model.)

- T. E; WOR-THINGTQN.

Rotary Drier. No. 230,980.

Patented Aug 10,1880.

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N. PETERS, PHOTO UNrrn STATES THOMAS E. CRTHINGTON, OF NEW HAVEN,CONNECTICUT, ASSIGNOR OF- ONE-HALF OF HIS RIGHT TO ANDREW J. RAMSDELL,()F SAME PLACE.

ROTARY DRIER.

SPECIFICATION forming part of Letters Patent No. 230,980, dated August10, 1880; Application filed June 28, 1880. (No model.)

To all whom it may concern:

Be it known that I, THOMAS E. WORTHING;

TON, a citizen of the United States, residing in the city of New Haven,county of New Ha- 5 ven and State of Connecticut, have invented certainnew and useful Improvements in R- tary Driers, fully described andrepresented in the following specification and the accompanyingdrawings, forming a part of the same. [0 In said drawings, Figure 1illustrates a front elevation of an apparatus embodying my invention.Fig.2 shows a longitudinal sectional elevation thereof; Fig. 3, ahorizontal section; Fig. 4., an elevation of the feeding end, 1 and Fig.5 a cross-sectional elevation, the last two figures being made to anenlarged scale.

Rotary driers as heretofore constructed have many defects, the principalone of which arises from structures that permit the products ofcombustion to have contact with the material being dried, wherebygreatinjury or destruction of the latter results.

It is the main object of myimprovements to overcome this and otherdefects both in structure and operation of rotary driers; and theinvention consists in providing the cylinder with cut-oft rings, wherebythe heating medium is .confined so that while passing around thecylinder it cannot escape toward the ends 0 thereofin mountin the clinderu on an inclined axis to cause the feeding movement of itscontents; in a supporting-shaft strengthened by a sustaining-truss; inproviding the delivery end of the cylinder with an internal 5 lining;and in specific constructions of parts too fully hereinafter set forthto need preliminary description.

The cylinder A, through which the material to be treated isautomatically carried, is

40 mounted to revolve upon an inclined axis or shaft, B, that is fixedin one end wall, C, of

the brick-work or other suitable housing, M,

for the furnace, and at the other in a stand-' ard, D, the latter beingprovided to admit the mounting of a driving-wheel, \N, in a suitableposition to receive motion from a driving mechanism. This cylinderAisprovided with journals 2 3, by which it is seated so as to rotate uponsaid shaft 13. The journal 2 is secured to the cylinder by means ofstay-rods 4.,

whereby the head of said cylinder may be diminished so as to consist ofa strengtheningflange, 5, and thus provide a feeding-opening throughwhich the stationary feeding-trough T may extend. The journal 3 issecured to the opposite end of the cylinder by stay-rods 6, that connectthe cylinder-head H with its flange 7, between which head and flange aneduction opening or passage, 8, is provided for the treated material.This cylinder is mounted within the walls or housing M of a furnace,that is provided with doors E, draftflues F, grate or fire surface G,and with conducting-pipes l K, leading from the arch of said housing tothe chimney J.

One great difficulty existing in the structure of such rotary driers isthe difficulty of confining the products of combustion so that the heatand smoke from the tire shall not only pass around the cylinder to heatthe same and be conducted out through the chimney, but at the same timebe prevented from following the cylinder longitudinally, and thusbecoming mixed with the material beingintroducedinto the cylinder fortreatment or delivered therefrom in its finished condition. When theproducts of combustion thus escape or are conducted laterally, so thatthey may combine with the material undergoing treatment, they eitherdestroy that material or so injure it as to greatly reduce its value.This improper action is detrimental to all materials treated, but isespecially injurious to malt and scrap.

By my construction this defective operation is entirely prevented, andthe means whereby it is accomplished consists in providing thecylinder-body with the annular rings 9, which embrace the exteriorsurface of the cylinderA and protrude therefrom so as to run in circularbearings 10, provided by cast-iron rings set 0 in the brick-work, whichrings might have substituted for them recessed bearings formed in thebrick-work. These rings 9 act as cutoffs, and form, with the peripheryof the cylinder A, a practicallytight compartment, 5 within which theheat is confined, and one that will direct the products of combustionaround said cylinder to the pipes I K, thu's properly directing theheating medium so that it is not only perfectly utilized but at the sametime prevents improper egress of the injurious gases and products ofcombustion at the ends of the cylinder, where they would have contactwith the material being treated and produce a deleterious eifect.

At its delivery end the apparatus is pro' vided with a chamber, N,inclosed by thehousing M, in which a fixed inclined plate, It, isarranged so as to underlie the end of the cylinder A, and thus receivethe material discharged therefrom and conduct it from the apparatus.

The shaft B of the cylinder, in consequence of the weight it is requiredto support, and for the reason that it must be of such small dimensionsas not to greatly abridge the working-space within said cylinder, isprovided with a supporting truss or brace, which, in the presentinstance, is composed of a post, 11, and a brace, 12, the latter havingits ends riveted to the shaft and resting centrally upon the post 11,and though the whole truss or brace is shown as depending from theshaft, it may bear any other relation to it; but as arranged it not onlyperforms the function of adequately strengthening the shaft, but cooperates to some degree with the stirrers with which the cylinder isprovided. These stirrers consist of stationary wings 16 17 18, more orless in number, that are fixed to project radially from the shaft 13 toa suitable distance toward the inner periphery of the cylinder, and of asuitable number of similar wings, as 19 20 21 22, that are fixed to andproject centrally from the interior walls of the cylinder. The wings 1617 18 occupy acentral position, while the wings 19 20 21 22 are arrangednear the ends of the cylinder, the first-named wings being heldstationary, while the latter move with the cylinder. The purpose ofthese wings is to cause the material fed into the cylinder to be stirredor turned as it is passing through the same, in order that all parts ofit may be equally exposed to the action of the heat, and thus cause themass to be uniformly dried, while the overheating or burning of anyportion of it is prevented. It may therefore be observed that anynumber, shape, or form of both stationary and movable wings may beadopted, and that a spiral arrangement, in some cases imparting aconstantly-increasing feed movement, may be adopted when the machine isto be used in the treatment of material that requires to have a morepositive forward movement through the cylinder than will be effected bythe mere inclination of said cylinder.

In order to adapt the apparatus to the treatment of material that isreadily injured by overheating, as malt and the like, the delivery endof the cylinder is provided with an internal lining, 25. This liningwill extend from about the center of the cylinder to the head H, aspractice and the character of the said material may require, and thusprovides a supportingsurface, between which and the medium an air-spaceis formed, which air-space affords the necessary protection fromoverheating or burning the material, which,in being conducted to thispoint, has been ridded to a great extent of its moisture and become sodry as to be easily afiected by the heat, and therefore very liable toinjury if subjected to the same degree of heat during its entire passagethrough the cylinder. By this contrivance I am enabled to keep up thesame degree of heat throughout the furnace and yet regulate itsapplication to the material within the cylinder.

In operating the apparatus, rotary motion of proper speed suited to thematerial to be operated upon is imparted to the cylinder B by properlydriving the wheel IV. The material to be dried is then fed, in suitablequantity, into the receiving end of the cylinder by means of the troughT. As soon as it rests upon the bottom of the cylinder it takes up itsrotary motion, and by means of the wings 19 20 21 22 and the inclinationof the cylinder is gradually moved toward the delivery end of thecylinder, thus passing over the furnace and being stirred or turnedinsuch passage by the combined action of its rotative movement throughthe wings 19 20 21 22 and the arresting action of the wings 16 17 18.When it is first entered into the cylinder it is surcharged withmoisture, which is evapo' rated by the heat, and this evaporation isincreased and becomes complete by the time the material reaches thedelivery end of the cylinder, where it is discharged through theopenings 8, and falls upon the inclined plate R, and may thence beconveyed in any common manner for packing or use.

The products of evaporation rising from the material under treatmentpass out of either end of the cylinder, and are conveyed to the chimneyJ or otherwise discharged by means of the pipes P Q, which are providedwith traps, as shown, to prevent the water of condensation flowing back,and thus discharging upon the material being treated.

Having thus described my improvements, what I claim is-- 1. In adrying-machine, the combination, with the housing of the furnace and theretating cylinder, of cut-off rings, as 9, whereby the products ofcombustion are confined, so as not to escape at the cylinder ends,substantially as described.

2. The combination, with the cylinder, of a stationary shaftstrengthened by a truss, substan tially as described.

3. A drying-machine the rotating cylinder whereof is provided at itsdelivery end with an internal lining, as 25, whereby an air-space isprovided, as set forth.

et. The combination, with the drying-cylin- (ler, of its fixed wings, as16 17 1S, and IDOV- I my hand in the presence of two subscribing 1 ingWings, as 19 20 21 22, substantially as dewitnesses.

scribed.

5. The combination, with the cylinder and THOMAS WORTHINGTON' 5 furnacehousing, of the rings 9 and seats or Witnesses:

bearers 10, substantially as described. CHAS. S. HAMILTON,

In testimony whereof I have hereunto set SAMUEL H. BARROWS.

